Alpha & Omega Semiconductor Inc. AO3415

Overview

AO3415 from Alpha & Omega Semiconductor is a -20V, -4A P-channel enhancement-mode MOSFET using trench technology, with R_DS(ON) < 41 mΩ at V_GS = -4.5 V and gate-threshold voltage of -0.57 V (typ), designed for low-voltage load switching in portable power management circuits.

For engineers reviewing the AO3415 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1.8 V logic-level gate drive compatibility, body-diode reverse recovery time of 26 ns (typ), ESD protection, and SOT-23 package thermal performance under pulsed load conditions.

Technical Context

The AO3415 operates as a single P-channel silicon MOSFET with enhancement-mode behavior, requiring negative gate-source voltage for conduction. Its trench process enables low R_DS(ON) down to 41 mΩ at -4.5 V and sub-1 V threshold voltage, supporting direct interface with 1.8 V/2.5 V microcontroller I/O without level-shifting.

It features an integrated body diode with V_SD = -0.64 V (typ) at -1 A and Q_rr = 51 nC (typ), enabling bidirectional current handling in synchronous buck high-side configurations and reverse-polarity protection circuits where fast recovery and low forward drop are critical.

Key Specifications

Pinout & Package

SOT-23 package: surface-mount, 3-pin plastic case with standard lead pitch (0.95 mm), rated for 1.5 W power dissipation at T_A = 25°C and thermal resistance R_θJA = 100°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel MOSFET applications.

Compared with Si2305DS and DMG1012T, the AO3415 offers the best balance of low gate-charge (9.3 nC), guaranteed 1.8 V drive capability, and stable R_DS(ON) across temperature-making it optimal for space-constrained, low-power, and battery-sensitive designs where gate drive simplicity and thermal predictability are prioritized.

Availability

AO3415 is available at Aetrix Electronics and suitable for battery management, USB power delivery, and hot-swap circuit design requiring stable component supply, consistent parametric performance, and long-term production availability.

Supply support for AO3415 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, IGBTs, and power modules for computing, consumer, industrial, and automotive markets.

The AO3415 belongs to AOS's logic-level P-channel MOSFET product line, engineered specifically for low-voltage, high-density power switching in portable and energy-conscious electronics.

FAQ

What is the maximum continuous drain current rating for the AO3415?

The AO3415 has a maximum continuous drain current (I_D) of -4 A at T_A = 25°C. This rating assumes proper PCB layout with 1 in² copper pour and still-air conditions. At elevated ambient temperatures or reduced copper area, derating applies per the R_θJA = 100°C/W thermal metric. The AO3415 maintains safe operation up to its 150°C maximum junction temperature when used within these limits.

Does the AO3415 support 1.8 V logic-level gate drive?

Yes, the AO3415 supports full enhancement at V_GS = -1.8 V, with R_DS(ON) < 65 mΩ at -2 A. Its typical gate threshold voltage is -0.57 V, and minimum is -0.3 V, ensuring reliable turn-on even with process variation. This makes the AO3415 compatible with 1.8 V and 2.5 V microcontrollers without external level-shifting circuitry-critical for low-power portable designs using the AO3415.

What is the body diode reverse recovery time of the AO3415?

The AO3415 has a typical body diode reverse recovery time (t_rr) of 26 ns under test conditions of I_F = -4 A and dI/dt = 500 A/µs. This fast recovery characteristic reduces switching losses and voltage overshoot in freewheeling and synchronous rectification applications. The associated reverse recovery charge (Q_rr) is 51 nC (typ), confirming suitability for high-frequency DC-DC topologies where the AO3415 serves as a high-side switch.

Is the AO3415 ESD-protected?

Yes, the AO3415 includes on-chip ESD protection rated per Human Body Model (HBM) per JEDEC JS-001. This protection safeguards the gate oxide during handling, PCB assembly, and system integration. While not intended for repeated ESD stress events in end-use, the built-in protection ensures robustness during manufacturing and field deployment-adding reliability to designs incorporating the AO3415 in exposed or user-accessible interfaces.

What package type does the AO3415 use, and what are its thermal characteristics?

The AO3415 uses the industry-standard SOT-23 package with three leads (Source, Gate, Drain). Its thermal resistance from junction-to-ambient (R_θJA) is 100°C/W under JEDEC-standard 1 in² FR-4 board conditions. Maximum power dissipation is 1.5 W at T_A = 25°C, and the device operates across -55°C to +150°C junction temperature range-enabling use in compact, thermally constrained applications where the AO3415 delivers predictable thermal performance.